Gu Xiaobai traveled through time, bringing with him the standard system.
But this is a test version.
…
"You mean, I stayed up all night studying and died suddenly, and then I had to go back and finish my homework before I could die successfully?" Gu Xiaobai asked uncertainly. He didn't believe that people could be so unlucky.
The serious plaid shirt expressionless: "Theoretically, this is the rule."
…
Motto: Don't delay